The classic Day of the Week For Any Date feat isn't hard with practice, but there's no shame in wanting an easier approach.

To make it easier, I've just released the 2008 version of my Day For Any Date Calendar! Besides being an attractive and functional 2008 calendar, it comes with an instruction booklet. The booklet details how to use the calendar to determine the day of the week for any date without looking at the month in question!

Not only has the calendar been updated and re-designed for 2008, but I've also reduced the price, The 2006 and 2007 versions went for $31.95. The 2008 version has been reduced to only $24.95!

The calendar uses the same basic idea as Zeller's Congruence, except that the math has been greatly simplified for you, and ingeniously hidden within the calendar design itself.

For a more detailed look at the calendar itself, click here, and click on the months to see their respective pictures. You can also see this by going to the calendar page and clicking on the View Larger Products: [1] link.

Also, don't forget to take a look around the rest of the store. Remember, anything you buy there helps keep Grey Matters running!